/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         https://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/

// General includes
#include <iostream>

// ITK includes
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkComposeImageFilter.h"
#include "itkTestingMacros.h"

int
itkComposeRGBAImageFilterTest(int argc, char * argv[])
{

  if (argc < 6)
  {
    std::cerr << "Missing parameters." << std::endl;
    std::cerr << "Usage: " << std::endl;
    std::cerr << itkNameOfTestExecutableMacro(argv) << " outputFile inputFileR inputFileG inputFileB inputFileA"
              << std::endl;
  }

  // Get arguments
  char * OutputFilename = argv[1];
  char * Input1Filename = argv[2];
  char * Input2Filename = argv[3];
  char * Input3Filename = argv[4];
  char * Input4Filename = argv[5];

  // Typedefs
  using ScalarPixelType = unsigned char;
  constexpr unsigned int Dimension = 2;
  using RGBAPixelType = itk::RGBAPixel<ScalarPixelType>;
  using ScalarImageType = itk::Image<ScalarPixelType, Dimension>;
  using RGBAImageType = itk::Image<RGBAPixelType, Dimension>;
  using ReaderType = itk::ImageFileReader<ScalarImageType>;
  using WriterType = itk::ImageFileWriter<RGBAImageType>;
  using ComposeFilterType = itk::ComposeImageFilter<ScalarImageType, RGBAImageType>;

  // Read input1
  auto reader1 = ReaderType::New();
  reader1->SetFileName(Input1Filename);
  reader1->Update();

  // Read input2
  auto reader2 = ReaderType::New();
  reader2->SetFileName(Input2Filename);
  reader2->Update();

  // Read input3
  auto reader3 = ReaderType::New();
  reader3->SetFileName(Input3Filename);
  reader3->Update();

  // Read input4
  auto reader4 = ReaderType::New();
  reader4->SetFileName(Input4Filename);
  reader4->Update();

  // Test ComposeRGBA filter
  auto filterCompose = ComposeFilterType::New();
  filterCompose->SetInput(0, reader1->GetOutput());
  filterCompose->SetInput(1, reader2->GetOutput());
  filterCompose->SetInput(2, reader3->GetOutput());
  filterCompose->SetInput(3, reader4->GetOutput());

  ITK_TRY_EXPECT_NO_EXCEPTION(filterCompose->Update());

  // Write output
  auto writer = WriterType::New();
  writer->SetFileName(OutputFilename);
  writer->SetInput(filterCompose->GetOutput());
  writer->Update();

  std::cout << "Test finished." << std::endl;
  return EXIT_SUCCESS;
}
